EasyManuals Logo

HP 34970A User Manual

HP 34970A
429 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #402 background imageLoading...
Page #402 background image
AC Measurement and Operating Characteristics
AC Measurement Characteristics
[1]
True RMS AC Voltage
Measurement Method:
Crest Factor:
Additional Crest Factor
Errors (non-sinewave):
[2]
AC Filter Bandwidth:
Slow
Medium
Fast
Input Impedance:
Input Protection:
AC-coupled True RMS – measures
the ac component of input with up
to 300 Vdc of bias on any range
Maximum 5:1 at Full Scale
Crest Factor 1-2: 0.05% of reading
Crest Factor 2-3: 0.15% of reading
Crest Factor 3-4: 0.30% of reading
Crest Factor 4-5: 0.40% of reading
3 Hz 300 kHz
20 Hz 300 kHz
200 Hz 300 kHz
1 M
± 2%, in parallel with 150 pF
300 Vrms on all ranges
Frequency and Period
Measurement Method:
Voltage Ranges:
Gate Time:
Measurement Timeout:
Reciprocal counting technique
Same as AC Voltage function
1s, 100 ms, or 10 ms
Selectable 3 Hz, 20 Hz, 200 Hz LF limit
True RMS AC Current
Measurement Method:
Shunt Resistance:
Input Protection:
Direct coupled to the fuse and
shunt. AC-coupled True RMS
measurement (measures the
ac component only)
5
for 10 mA; 0.1 for 100 mA, 1A
1.5A 250 V fuse on HP 34901A module
Measurement Noise Rejection
[3]
AC CMRR: 70 dB
Measurement Considerations (Frequency and Period)
All frequency counters are susceptible to error when measuring
low-voltage, low-frequency signals. Shielding inputs from
external noise pickup is critical for minimizing measurement errors.
AC Operating Characteristics
[4]
Function
ACV, ACI:
Digits
[5]
6
1
2
6
1
2
6
1
2
6
1
2
6
1
2
Readings/s
7 sec/reading
1
8
[6]
10
100
[7]
AC Filter
Slow (3 Hz)
Medium (20 Hz)
Fast (200 Hz)
Fast (200 Hz)
Fast (200 Hz)
Single Channel Measurement Rates
[8]
Function
ACV:
Frequency, Period:
Resolution
6
1
2
Slow (3 Hz)
6
1
2
Medium (20 Hz)
6
1
2
Fast (200 Hz)
6
1
2
[7]
6
1
2
Digits (1s gate)
6
1
2
Digits (1s gate)
[7]
5
1
2
Digits (100 ms)
5
1
2
Digits (100 ms)
[7]
4
1
2
Digits (10 ms)
4
1
2
Digits (10 ms)
[7]
Readings/s
0.14
1
8
100
0.77
1
2.5
9
3.2
70
[1] 300 Vrms isolation voltage (ch-ch, ch-earth)
[2] For frequencies below 100 Hz, slow AC filter specified for
sinewave input only
[3] For 1 k
unbalance in LO lead
[4] Maximum reading rates for 0.01% of ac step additional error.
Additional settling delay required when input dc level varies.
[5] 6
1
2
digits=22 bits, 5
1
2
digits=18 bits, 4
1
2
digits=15 bits
[6] For external trigger or remote operation using default
settling delay (Delay Auto)
[7] Maximum limit with default settling delays defeated
[8] For fixed function and range, readings to memory,
scaling and alarms turned off
9
Chapter 9 Specifications
AC Measurement and Operating Characteristics
407

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the HP 34970A and is the answer not in the manual?

HP 34970A Specifications

General IconGeneral
BrandHP
Model34970A
CategorySwitch
LanguageEnglish

Related product manuals